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发明名称
摘要
申请公布号
JPS5246840(Y2)
申请公布日期
1977.10.24
申请号
JP19740008647U
申请日期
1974.01.17
申请人
发明人
分类号
E04F13/12;E04C2/30;E04F13/18;E04F15/10;(IPC1-7):E04F13/18
主分类号
E04F13/12
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